Physical Sciences and Engineering

Nuclear energy has been used as a source of clean energy with many benefits. Nevertheless, it is still addressed with prejudice. The atomic bombing of Hiroshima and Nagasaki during World War II (1945), the Three Mile Island accident (1979), Chernobyl accident (1986), the crash of the cesium-137 in Goiânia, Brazil (1987), and the accident in Fukushima (2011) may have been responsible for the negative image of nuclear energy. Researches on education have been conducted with students concerning the conceptual and practical issues of nuclear energy.

Lean manufacturing is concerned with the implementation of several tools and methodologies that aim for the continuous elimination of waste throughout manufacturing process flow in the production system. Lean manufacturing also focuses on company’s goals of improving quality, reducing inventory and becoming more competitive. This research addresses the implementation of lean principles and tools in a small-medium size plastic industry, and focuses on a manufacturing enterprise producing “Fused” plastic bags products.

The main objective of this article was to analyze the effect of the budgetary efficiency and the socioeconomic conditions represented by the indicators of Income, Health, Education and Population Size of the 417 municipalities of the State of Bahia, Brazil, from 2009 to 2013. For this purpose, based on the Panel Data estimation models, the indicator of Degree of Budget Efficiency was created,an evaluation instrument thet allows verifying whether municipalities are achieving the goals of budget planning.

In recent years, the advent of Post Modernism geared towards meeting human needs embraced the use of sophisticated building materials as a means of improving the flexibility of building interior spaces for optimum use. The need to maximize space for various purposes, a secure light transmission that enhances both light and vision, aesthetical transparency, with excellent acoustic control around a working area is invariably needed mostly in office buildings.

In Rondônia little is known about the behavior of solar radiation, thus follows in this paper the maximum annual distribution, minimum and average for global and direct solar radiation, the annual distribution of temperature, the maximum possible sunshine for the city of Rolim de Moura, thus providing useful information for planning and use of renewable resources.

The article aims at comparative cost analysis between two structural systems in reinforced concrete, one using solid slabs as flat elements and the other using unidirectional prefabricated ribbed slab with lattice beams.

Tafila wind turbines farm is the largest project of wind energy to generate the electricity in Jordan until now. The major Tafilawind turbines farm (38 wind turbines) presents a 117-Mega Watt (3.075 MW/ Turbine) wind turbine power. Total design/build phase of the project is 21 months and the operations phase is 20 years, the total cost of the project is 290 million $ with100% funded through private investment which produce about4 % of the national electricity demand each year that is enough electricity to power 85,000 homes.

The performance of a genetic algorithm (GA) depend on many factors: the selection method is one of them. It is well known that the genetic algorithm efficiency depends to a high degree upon the selection of the good GA operators and parameters that suitable to the different scheduling problems. In this paper, we find the selection methods of genetic algorithm that are more suitable for scheduling problem. Also, a number of selection methods used in scheduling problem have been described in this paper like random selection, roulette wheel selection, rank selection and tournament selection.

Advanced oxidation induced by cold plasma under the high voltage electrical barrier discharge exhibits a wide use in practice due to be able to produce very high concentrations of reactive oxygen species with short and long life. The reactive oxygen species generated include free radicals (•OH) and other oxidative reagents like ozone, hydrogen peroxide. The quantification of these oxidative components is truly imperative to application in wastewater treatment to design plasma reactors. The concentrations of these species might be determined by many methods.

To evaluate the host-feeding preference of Cx. quinquefasciatus in southern Benin, a cross-sectional study was carried out in five neighborhoods, two at Cotonou and three at Porto-Novo, from December 2017 to March 2018. In each neighborhood, 4 inhabited houses were selected as mosquito catching sites. The collection of mosquitoes was conducted by pyrethrum spray captures (PSC) from 07:00am to 9:00am every morning and twice a week.